EP0090499A3 - Magnetic recording medium - Google Patents

Magnetic recording medium Download PDF

Info

Publication number: EP0090499A3
Authority: EP; European Patent Office
Prior art keywords: recording medium; magnetic recording; magnetic; medium; recording
Prior art date: 1982-03-30
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP83301031A

Other versions

EP0090499A2 (en

EP0090499B1 (en

Inventor

Toshiyuki Asakura

Hiroaki Kobayashi

Nobuaki Itoh

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Toray Industries Inc

Original Assignee

Toray Industries Inc

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1982-03-30

Filing date

1983-02-25

Publication date

1985-04-03

1982-03-30 Priority claimed from JP5189582A external-priority patent/JPS58168655A/en

1982-09-08 Priority claimed from JP57155158A external-priority patent/JPS5945124A/en

1983-02-25 Application filed by Toray Industries Inc filed Critical Toray Industries Inc

1983-10-05 Publication of EP0090499A2 publication Critical patent/EP0090499A2/en

1985-04-03 Publication of EP0090499A3 publication Critical patent/EP0090499A3/en

1989-05-24 Application granted granted Critical

1989-05-24 Publication of EP0090499B1 publication Critical patent/EP0090499B1/en

Status Expired legal-status Critical Current

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
- G11B5/73937—Substrates having an organic polymer comprising a ring structure
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/90—Magnetic feature
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
- Y10T428/264—Up to 3 mils
- Y10T428/265—1 mil or less
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
- Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31725—Of polyamide

EP83301031A 1982-03-30 1983-02-25 Magnetic recording medium Expired EP0090499B1 (en)

Applications Claiming Priority (5)

Application Number	Priority Date	Filing Date	Title
JP5189582A JPS58168655A (en)	1982-03-30	1982-03-30	Magnetic recording medium
JP51895/82		1982-03-30
JP155158/82		1982-09-08
JP57155158A JPS5945124A (en)	1982-09-08	1982-09-08	Aromatic polyamide film
JP4169461A JP2553282B2 (en)	1982-09-08	1992-06-26	Aromatic polyamide film composite

Publications (3)

Publication Number	Publication Date
EP0090499A2 EP0090499A2 (en)	1983-10-05
EP0090499A3 true EP0090499A3 (en)	1985-04-03
EP0090499B1 EP0090499B1 (en)	1989-05-24

Family

ID=27294478

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP83301031A Expired EP0090499B1 (en)	1982-03-30	1983-02-25	Magnetic recording medium

Country Status (3)

Country	Link
US (1)	US4645702A (en)
EP (1)	EP0090499B1 (en)
DE (1)	DE3379923D1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4772394A (en) *	1984-12-26	1988-09-20	Uop Inc.	Chlorine-resistant semipermeable membranes
US4732814A (en) *	1985-10-03	1988-03-22	Toray Industries, Inc.	Polyester film with smooth and highly adhesive surface and method of making same
JPS62219317A (en) *	1986-03-20	1987-09-26	Sony Corp	Thin metallic film type magnetic recording medium
JPS62229519A (en) *	1986-03-29	1987-10-08	Canon Inc	Magnetic recording medium
US5425980A (en) *	1994-02-22	1995-06-20	Eastman Kodak Company	Use of glow discharge treatment to promote adhesion of aqueous coats to substrate
EP0716414B1 (en) *	1994-06-23	2003-04-23	Toray Industries, Inc.	Magnetic recording medium
JP2616711B2 (en) *	1994-09-14	1997-06-04	東レ株式会社	Magnetic recording media
CA2225074A1 (en) *	1996-04-19	1997-10-30	Toshihiro Tsuzuki	Aromatic polyamide film,its method of production and magnetic recording media employing same
TW385275B (en)	1996-08-29	2000-03-21	Toray Industries	Aromatic polyamide-based resin molding, a process therefor and magnetic recording medium made from the molding
DE69824261T2 (en) *	1997-03-21	2004-09-23	Toray Industries, Inc.	AROMATIC POLYAMIDE FILM AND MAGNETIC RECEIVER MADE FROM THIS FILM
TW500662B (en) *	1998-07-21	2002-09-01	Teijin Ltd	Aromatic polyamide film laminate
JP4161378B2 (en) *	1998-09-30	2008-10-08	東レ株式会社	High dimensional stability polymer film and magnetic recording medium using the same
US6780519B1 (en) *	2000-11-28	2004-08-24	3M Innovative Properties Company	Flame-treating process
US7083871B2 (en) *	2002-05-09	2006-08-01	Maxtor Corporation	Single-sided sputtered magnetic recording disks
JP2004098570A (en) *	2002-09-11	2004-04-02	Amt Kenkyusho:Kk	Film-like laminate and flexible circuit substrate
JP4543395B2 (en) *	2003-11-14	2010-09-15	東レ株式会社	Film and magnetic recording medium using the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2743916A1 (en) *	1976-09-29	1978-03-30	Fuji Photo Film Co Ltd	Magnetic recording material, esp. for video tapes - comprises support, magnetic layer and cationic surfactant backing layer
US4112187A (en) *	1973-12-28	1978-09-05	Toray Industries, Inc.	Magnetic recording medium supported on aromatic polyamide
US4308311A (en) *	1978-07-26	1981-12-29	Fuji Photo Film Co., Ltd.	Magnetic recording material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5284246A (en) *	1976-01-07	1977-07-13	Toray Ind Inc	Production of aromatic polyamide film

1983
- 1983-02-25 EP EP83301031A patent/EP0090499B1/en not_active Expired
- 1983-02-25 DE DE8383301031T patent/DE3379923D1/en not_active Expired
1984
- 1984-12-27 US US06/685,965 patent/US4645702A/en not_active Expired - Lifetime

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4112187A (en) *	1973-12-28	1978-09-05	Toray Industries, Inc.	Magnetic recording medium supported on aromatic polyamide
DE2743916A1 (en) *	1976-09-29	1978-03-30	Fuji Photo Film Co Ltd	Magnetic recording material, esp. for video tapes - comprises support, magnetic layer and cationic surfactant backing layer
US4308311A (en) *	1978-07-26	1981-12-29	Fuji Photo Film Co., Ltd.	Magnetic recording material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1, no. 131, 28th October 1977, page 2974 C77; & JP-A-52-84246 (TORAY) 13-07-1977 *

Also Published As

Publication number	Publication date
EP0090499A2 (en)	1983-10-05
DE3379923D1 (en)	1989-06-29
US4645702A (en)	1987-02-24
EP0090499B1 (en)	1989-05-24

Publication	Publication Date	Title
DE3278980D1 (en)	1988-10-06	Magnetic recording medium
DE3370711D1 (en)	1987-05-07	Magnetic recording medium
DE3379082D1 (en)	1989-03-02	Magnetic recording medium
DE3375616D1 (en)	1988-03-10	Magnetic recording medium
DE3371260D1 (en)	1987-06-04	Magnetic recording medium
DE3380753D1 (en)	1989-11-23	Magnetic recording medium
DE3479066D1 (en)	1989-08-24	Magnetic recording medium
DE3377755D1 (en)	1988-09-22	Magnetic recording media
DE3479615D1 (en)	1989-10-05	Magnetic recording medium
DE3370710D1 (en)	1987-05-07	Magnetic recording medium
EP0137949A3 (en)	1987-08-26	Magnetic recording medium
GB2116075B (en)	1985-08-29	Magnetic recording medium
DE3378237D1 (en)	1988-11-17	Magnetic recording medium
DE3464977D1 (en)	1987-08-27	Magnetic recording medium
DE3468570D1 (en)	1988-02-11	Magnetic recording medium
DE3379923D1 (en)	1989-06-29	Magnetic recording medium
GB2133315B (en)	1986-02-26	Magnetic recording medium
DE3468569D1 (en)	1988-02-11	Magnetic recording medium
DE3373584D1 (en)	1987-10-15	Magnetic recording medium
DE3472321D1 (en)	1988-07-28	Magnetic recording medium
GB2133316B (en)	1986-12-03	Magnetic recording medium
DE3375243D1 (en)	1988-02-11	Magnetic recording medium
GB2127437B (en)	1985-09-04	Magnetic recording media
DE3476711D1 (en)	1989-03-16	Magnetic recording medium
EP0125150A3 (en)	1986-01-15	Magnetic recording medium

Legal Events

Date	Code	Title	Description
1983-08-05	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1983-10-05	AK	Designated contracting states	Designated state(s): DE GB NL
1985-02-01	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1985-04-03	AK	Designated contracting states	Designated state(s): DE GB NL
1985-10-16	17P	Request for examination filed	Effective date: 19850726
1987-11-19	17Q	First examination report despatched	Effective date: 19871002
1989-04-08	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1989-05-24	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE GB NL
1989-06-29	REF	Corresponds to:	Ref document number: 3379923 Country of ref document: DE Date of ref document: 19890629
1990-03-30	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1990-03-30	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1990-05-16	26N	No opposition filed
2001-02-28	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: NL Payment date: 20010228 Year of fee payment: 19
2002-01-01	REG	Reference to a national code	Ref country code: GB Ref legal event code: IF02
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2002-03-13	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 20020313 Year of fee payment: 20
2002-09-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020901
2002-11-01	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee	Effective date: 20020901
2003-02-24	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20030224
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